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authorNils Gladitz <nilsgladitz@gmail.com>2013-11-20 08:53:06 (GMT)
committerBrad King <brad.king@kitware.com>2013-11-21 14:24:08 (GMT)
commita02f3d2de00a16a68e8948db3c0de507e569f8a3 (patch)
tree065ce76b2c29a27325a0d36a8869856dbfb6dbe9 /Help/policy
parenta61025135b1c1ceea9634973b983bd3e47be8bdd (diff)
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Add policy CMP0040 to disallow custom commands on missing targets
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diff --git a/Help/policy/CMP0040.rst b/Help/policy/CMP0040.rst
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+CMP0040
+-------
+
+The target in the TARGET signature of add_custom_command() must exist.
+
+CMake 2.8.12 and lower silently ignored a custom command created with
+the TARGET signature of :command:`add_custom_command`
+if the target is unknown.
+
+The OLD behavior for this policy is to ignore custom commands
+for unknown targets. The NEW behavior for this policy is to report and error
+if the target referenced in :command:`add_custom_command` is unknown.
+
+This policy was introduced in CMake version 3.0.0. CMake version
+|release| warns when the policy is not set and uses OLD behavior. Use
+the cmake_policy command to set it to OLD or NEW explicitly.